Jo Marney, the lover of UKIP chief Henry Bolton, launched a vile attack on American former Suits actress Markle, who is biracial.

Now there are calls for Bolton’s resignation. The politician, 54, is already under fire for leaving his wife for sexy Marney, 25.

The Mail on Sunday revealed shocking messages to a pal in which Marney said that Prince Harry’s “black American” fiancee will “taint” the Royal Family with “her seed” and pave the way for a “black king.”

Marney also said that she would never have sex with “a negro” because they are “ugly.”

The model also described Markle, whose mother is black and whose father is white, as “a scrubber” and a “gender equality t***” who is “obsessed with race” and a “dumb little commoner.”

Writing about ethnic minorities in general, Marney said that they are “pushing their way to the top slowly slowly. Next will be a Muslim PM. And a black king.”

To her friend, Marney complained that there is “an immigration problem,” opining, “This is Britain. Not Africa.”

After her pal accused her of being racist, Marney wrote, “Lol so what… Not wanting other races and cultures to invade your own culture doesn’t mean I hate their race. Just means I don’t want their cultures invading mine.”

She was immediately suspended from her Ukip party membership after The Mail on Sunday told party chiefs about her stunning, offensive comments.

Bolton could be axed over the scandal by the party’s ruling National Executive Committee on Thursday.

Marney has apologized for her comments to The Mail, saying in a statement, “I apologize unreservedly for the shocking language I used. The opinions I expressed were deliberately exaggerated in order to make a point and have, to an extent, been taken out of context. Yet I fully recognize the offense they have caused.

“No offence was intended and, again, I apologize unreservedly for any such offence or hurt that my messages have caused to members of the public, members of Ukip my friends, family and loved ones.

“I have disappointed them all and let myself down. I cannot sufficiently express my regret and sadness at having done so,” Marney said.